Because humans are stupid? They used to think dinosaurs had scales, too.

[stupid is probably a little harsh, but... it's true.]

I suppose there are some crabs that are red, but most turn that color because they've been boiled alive.

[thankfully, this blue crab will live to see many more days, assuming nothing bigger grabs it for a quick snack. kni reaches for vash's hand and starts to tug him along again.]

C'mon, you can at least have your breakdown on the beach.